Castelion

Company · Munitions and hypersonics

$13B · hypersonic missiles

Low-cost hypersonic strike weapons. Founded by ex-SpaceX engineers; $800M Series C at $13B in August 2026.

Money: Raised $1.27B to date
Valued at $13B (round 2026-08)
As of 2026-08-20 · source 1 source 2
Series C = $800M equity plus a $250M credit facility; raised excludes the revolver.
Backed by: Andreessen Horowitz Lightspeed
Link status: confirmed
People behind the money: Marc Andreessen Ben Horowitz Katherine Boyle